Bucket.



L. J. HATT.

BUCKET.

APPLICATION FILED ocr.12.u911.

1 ,298,340. Patented Mar. 25, 1919.v

3 SHEETS-SHEE.T l-

[We 0 o o o 1 a Invenior:

L. J. HATT.

BUCKET.

APPLICATION FILED OCT. 12. 1911.

Patented Mar. 25,1919.

3 SHEETS-SHEET 2.

i o L 9 9 Q- L. J. HATT.

BUCKET.

APPLICATION map OCT. 12. 1911.

Patented Mar. 25, 1919.

3 SHEETS-SHEET 3.

I nveor Alga 7,412:

Elli thereof.

- or jaws to cause LEMUEL J. HA'IT, OF ST. LOUIS, MISSOURI.

sucimr.

To all whom it may concern:

Be it known that I, LEMUEL J. HATT, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have inventedcertain new and useful Improvements in Buckets, of which the followingis a specification, reference being had to the accompanying drawings,forming a part This invention relates to certain new and usefulimprovements in buckets of the class employed in excavating, dredging,hoisting, and conveying, and in the present instance I have shown'myimprovements in a bucket bucket embodying my present invention;

of the type commonly known as the clamshell bucket.

In the bucket .shown herein, as in the bucket shown and described inLetters Patent No. 1097317, issued to me May 19, 1914, I employ asupporting-head or upper center, a lower center, and two lines orcables, one the hoistingline or supporting-cable, as I will call it,forsupporting and raising and lowering the bucket, and the other theclosing-line or load-cable,

as I will call it, for closing the trays or jaws of the bucket upon thematerial being operated upon. The closing of the trays is effected bymeans of a tackle device comprising a series of rotatable sheaves orpulleys in both the upper and lower centers of the bucket, around andover which the closing-line or load-cable is reeved, power being therebyapplied upon the trays the bucket to dig efliciently. Thesupporting-head or upper center in my present bucket is also equippedwith additional sheaves or pulleys, which take the bight of thehoisting-line or. supportingcable. The bucket as a whole thus working inthe bight of the hoisting-line or supporting-cable, not only are strainsupon the cable and also the trolley, when the bucket is used inconnection with bridges and cable-ways, balanced or neutralized, but thebucket also may be both hoisted and trolleyed at the same time withoutthe employment of a compensating device in the operating machine.

The objects of my present invention are to provide a strong, durable,powerful, and eflicient bucket of the kind stated which may be operatedwith facility at hlgh speed and in which the upper and lower centers andtrays or aws are maintained with rlgldity Specification of LettersPatent.

4 Fig.

- spectively,

Patented Mar. 25,1919.

Application filed October 12, 1917; Serial No. 196,198.

in proper operative alinement under substantially all working conditionsand strains upon the severalparts distributed with evenness' throughoutthe bucket, and to improve generally upon, and simplify the constructionof, buckets of the class described.

. With the above and other objects in view, my present invention residesin certain novel features of form, construction, arrangement, andcombination of parts, all as will herelnafter be described and afterwardpointed out in the claims.

In the accompanying drawings,

Figure 1 is an end elevational view of a Fig. 2 is a side elevationalview thereof with the trays or jaws of the bucket in closed position;

Fig. 3 is a vertical sectional view through the bucket with its trays orjaws in open position;

Fig. 4 is a plan view of the supportinghead or upper center of thebucket, the supporting and load cables being omitted;

5 is a plan view of the lower center of the bucket, the loadcable beingomitted;

Fig. 6 is a view partly. in side elevation and partly in section of thelower center;

Figs. 7 and 8 are elevational views, re-

wedge-member employed in pivotally securing the tray-arms to the lowercenter;

Fig. 9 is a view, partly in elevation and partly in section, of theupper rear end of the trays or jaws, illustrating the means preferablyemployed for pivotally securing to the trays the supporting-headconnectingrods or bars;

Figs. 10 and 1,1 are elevation and partly in section, sheave-casing orhousing;

Figs. 12 and 13 are similar views of the upper sheave-casing or housing;

Fig. 14 is a fragmentary sectional view of the supporting-head or uppercenter, illustrating one of the sets of guiding-sheaves for the closingor load-cable; and

i Fig. 15 is a similar view, illustrating one of the sets ofguiding-sheaves and also one of the main sheaves for the hoisting-lineor supporting-cable.

Referring to the said drawings, in which like reference characters referto like parts throughout the several views, the cooperatdetail views,partly in of the lower ing trays, bowls, or jav s. as they are variouslycalled, of the bucket, which, when open and while closing, act or serveas digging members in picking up the load and, when closed, also form orprovide the receptacle for hoisting and carrying the load, are eachpreferably built up structures of the shape or form shown, eachcomprising a bottom preferably gradually convexed wall or pl te 1 andsidewalls or plates 22. To correspond with the convexity of bottom wall1, side Walls 2-2 are wider or of greater depth at their inner or frontends than at theirouter or rear ends, the marginal portions of wall 1being flanged upwardly and riveted or otherwise rigidly fixed to sidewalls 22. Each side wall 2 at the rear of the tray is formed with orterminates in a projecting ear or extension 3, for purposes hereinafterappearing. The trays are also, as is common in buckets of this class, toincrease their digging efliciency, provided at their inner or frontportions with preferably renewable both side and bottom cutting'platesor edges 4 and 5, respectively. Rive-ted or otherwise fixed at theirlower ends to the upper edgeportions of side walls or plates 2 2, areSomewhat angular rigid extension-plates or arms 6-6. .At its upper end,each arm 6 is rounded as shown and has riveted or otherwise fixedthereto and preferably upon each side thereof a correspondingly shapedreinforcing and thickening plate 7 each arm Gwith its plat-e or plates 7being suitably transversely apertured to accommodate a headed pivot-pin8.

I The lower center of the bucket is preferably a comparatively heavybox-like casting having a rounded bottom wall 9, flat side walls 10-40,and end walls 11 11 also flat upon their outer face, as seenparticularly in Fig. 6. This lower center or casting is adapted tocontain and house the lower trayopening-and-closing sheaves and also toreceive and contain a suitable lubricant for not only lubricating suchsheaves, but also preserving and maintaining the flexibility. of theclosing or load-cable which, in the finished bucket, is reeved aroundthesheaves mentioned. The bottom wall 9 of the lower center is, as shown,provided with a suitable lubricant drain-outlet 12 normally closed by asuitable removable stopper 13. At each end, the lower center is formedwith an outwardly projecting extension-wall 14 having a dependingportion 15 apertured to accommodate, and being adapted to provide abearing for, a tray-arm pivot-pin 8. Each extension-wall 14: of thelower center is thin-y ner at its edges than at its center, the undersurface of each such wall 14: being suitably beveled in a direction fromapproximately the center thereof outwardly toward the sides of thecasting, as seen particularly in Fig. 6 and as indicated by dotted linesin Fig. 2, to provide the oppositely-disposed upwardly inclined faces14:"14 for purposes hereinafter appearing.

To the lower center, the extensions or arms 6 of the trays are pivotallyfastened, the upper reinforced ends of a pair of said arms, one fromeach tray, being fitted as shown between an end wall 11 and its adjacentextension-wall portion 15 and a pivotpin 8 inserted into the thenregistering apertures in said wall-portion 15 and arms 6, a reducedextension 8 on the pin fitting into a suitable aperture in the end wall11 of the casting. Suitable registering transverse bores in end wall 11of the-casting and in reduced end-portion 8 of the pin 8 being provided,a wedge-shaped locking-pin or the adapted to communicate, when pivot-pin8 is seated, with a bore or way 19 in the pin; communicating with thelatter in -pin'8 are outlet paths or ways 202O leading to the tray-arms6, whereby, througha system of lubrication, the tray-arms 6 at the pins8 l i are continuously lubricated under substantially all workingconditions to whichthe.

bucket may be subjected. The upper or feed end of lubricant-bore or way18 is normally removably closed by a suitable plug or stop-. per 21.

The supporting-head or upper center of the bucket is preferably an openor skeleton casting having the shape or form shown and comprising sidewalls 2222, end walls 2323, and diagonally disposed intermediate walls24.-.24.'between which latter walls the upper tray-opening-and-closingsheaves are arranged, as hereinafter more fully appears. Side andintermediate walls 22 and 24:, respectively, are preferably braced orstrengthened by webs or the like 25. Adjacent each end and at diagonallyopposite points, the casting is formed with vertically bored portions 26for purposes hereinafter,

appearing and which, in the assembled or completed bucket, areapproximately in vertical alinement with diagonally opposite cor ners ofthe chamber of the lower center. Each end wall 23 of the upper centercasting is formed approximately centrally with a ver- "tically boredportion 27, in vertical alinement with which is a second bored portion28 formed on a short rigid approximately rectangularlug-portion 29depending from, and forming substantially a part of, the casting as seenparticularly in Fig. 15, said alining bored portions 27-28 providing athe bucket and journaled to freely rotate between thefyoke-plates 32 atpoints adjacent the opposite ends of the upper center, is a pair ofgrooved pulleys or sheaves 33-33 adapted to take the bight of thehoisting or supporting-cable S for supporting or holding and libistingthe bucket as a whole. ,At each of its corners, as seen particularly inFig. 4, the upper center casting is formed with a pair of spaced ears3434.

3535 gindicate the connecting-links or bars for 'pivotally fastening thetrays or jaws of the bucket to the upper center casting.

these linksor bars, there are preferably four, two foreabh tray, theupper ends 5f these links 01' bars 35 being positioned, respectively,between a pair of the ears 34 and suitably pivotally fastened thereto bypivot-pins or the like 36 held from turning in their bearings bycheck-pins not shown The manner ofipivotally fastening the lower ends ofthe connecting-links or bars 35 ,-to the trays is'i'liown in detail inFig. 9. Ala-there shown, each link 35 is formed or proyided at its lowere'iidwith an apertured enlargement or hub 37-, the'hubs 37 of a pair ofthe links 35 abutting flatwise at their respective outer faces upon'theinner faces of ears 3 of the particular tray. Disposed between said hubs37 and extending transversely of the tray, is a tubular or pipemember 38provided adjacent its ends with pairs of diametrically opposite orregistering openings 39, a washer or the like 40 being interposedbetween each hub 37 and the adjacent'end of the pipe-member 38.Projected lengthwise through each tray-ear 3 and its abutting link-hub37, is headed pivot-pin or the like 41 having a reduced ex- I tension 42fitting into the pipe-member 38. the pin-extension 42 being suitablytransversely apertured to provide the same with a cam-face, as at 43.Extending through the aperture in said pin-extension 42 and also througha pair of the registering openings 39 in pipe-member 38, is a Wedge-pinor the like 44 engaging camwise with theIeiim-face 43 of the pivot-pin41, the pair of links 35 being thus securely fastened pivotally to theparticular tray orjaw of the bucket. The wedge-pins 44 are preferablyheld from removal by cotter-pinsor the like 45. Adjathe tipposite orform to conveniently and neatly fit the' lower center casting, theseveral plates 48 being transversely bored to accommodate a sheave-shaft49 and being securely held to gether in properly spaced relation bymeans of tubular spacing-members 50 and through- I bolts or rivets 51,as illustrated particularly in Fig. 11. Rotatably mounted on thesheaveshaft 49, which extends through, and has a bearing in, the sidewalls 10 of the lower center and which also extends through the severalplates 48 and holds the same against removal from the lower center, is aseries of independent grooved pulleys or sheaves 52. These pulleys orsheaves 52, preferably four in number and around which the closing orload-cable L is reeved, form one part of the tackle-device for clos ngthe trays or jaws of the bucket, the several pulleys or sheaves 52 beingdisposed respectively in the several compartments or divisions of thelower center provided by the plates 48 which latter, being positioned,as seen particularly in Fig. 3, not only between the sev eral respectivesheaves 52', but also between the outermost sheaves 52 and the sidewalls of the lower center casting, serve to guide the line or cable Land prevent the same from slipping out of or jumping the grooves of thesaid several sheaves 52.

Fixed fiatwise upon the outer face of one side wall 10 of the lowercenter casting, is a keeper-plate 53 formed or provided with a squaredaperture adapted to take or seat a correspondingly squared extension 54on one end of the sheave-shaft 49 to hold the shaft 49 from turning inits bearings, the plate 53 together with a cotter-pin or the like 55projected through the shaft-extension 54 holding the shaft 49 fromworking loose or accidental removal.

As seen particularly in Fig. 3, the sheaveshaft 49 is longitudinallybored to provide a lubricantway 56, communicating with which in shaft 49are transverse outlet ducts 57 leading to the several respective pulleysor sheaves 52, whereby also through a system of lubrication, the severalsheaves 52 a e continuously lubricated at their hubs under substantiallyall working conditions to which the bucket may be subjected. The outeror feed end of way or bore 56 is normally reniova bly closed by asuitable plug or stopper 58.

Likewise fitting between intermediate walls the casting walls 24,whereby the upper,

sheave-casing as an entirety is securely held 1n operative position inthe upper center casting. Rotatably mounted on the sheaveshaft 60, whichextends through, andh'as fa 7 bearing in, said intermediate walls 24 ofthe upper center casting, and which also ex.- tends through the severalplates 59, is a second or upper series of independent grooved pulleys orsheaves 63. These upper sheaves 63, preferably three in number andaround which the closing or load-cable L is'al'so reeved, form anotherpart of the tackle device for closing or operating the trays or jaws ofthe bucket, the several pulleys or sheaves 63 being similarly disposedrespec tively in the several divisions of the upper center castingprovided by the plates 59,

which latter also, like the lower sheave-cas-.

ing plates 48, serve to guide theline or c'able L and prevent the samefrom slipping out of or jumping the grooves of the said several sheaves6 Upper sheave-shaft 60, like lower sheaveshaft 49, is formed with asquared end-extension 64 and is similarly held from turning in itsbearings and from removal by means of a keeper-plate 65 fixed flatwiseupon the outer face of one intermediate wall 24 of the upper centercasting and accommodating said shaft-extension 64 and a cotter-pin orthe like 66 projected through the extension 64:, as seen particularly inFig. 1. While not specifically shown, I also provide for the uppersheaves 63 a system of lubrication similar to that shown and describedin connection with lower sheaves52.

Mounted to freely rotate or swivel in the vertically bored portions 26of the upper center casting, are tubular guide-pulley supporting-membersor thimbles 67 for the line or cable L. Each member or thim-ble 67 ispreferably provided at its ends with collars or the like 68-68, as seenparticularly in Fig. 14, which serve to prevent endwise movement of thethimble relatively to'the supporting-head or upper center casting. Eachthimble 67 is also formed or provided at its upper end with a pair ofupwardly projecting suitably spaced plates or Wings 6969, between whichare journaled to freely rotate a pair of grooved idler pulleys orsheaves mounting upon the upper center casting of 707O havin their axesat different elevations, one ob iquely above. the other, relatively tothe upper. center casting, the pulleys or sheaves 70 being so journaledand spaced obliquely one below the other and with their peripheralportions in such relation that for parts of their rotary traveltheperipheral or grooved portions of both pulleys Will not only rotateinthe same horizontal plane relatively to the supportinghead, but also ina plane vertically in alinement approximately with the bore of theirsupporting-thimble, as illustrated particularly in Fig. 14, and henceapproximately also in vertical alinement with one of the outermost ofthe lower sheaves 52.

The reeving of the closing or load-cable L around the sheaves 52 and 63in my present bucket is substantially similar to the reeving of thecable Las shown and fully described in said Letters Patent N 0. 1097317hereinbefore mentioned, and hence specific description thereof will behere omitted. And in such reeving, as the line or cable L is threadedbetween the respective pairs of pulleys or sheaves 70 as it enters andleaves the bucket, the pulleys or sheaves 70 serve as anti-frictionguides therefor, and by their described relative arr'angement andswiveled the bucket, the pulleys 70 prevent wear upon or cutting of theline or cable L .under substantially all working or operatingconditions, irrespective of the position of the bucket.

Riveted to the upper casting end Walls 23 and their lugs 31, arespaced'pairs of upwardly projecting plates or wings 71, between whichare journa-led to freely rotate pairs of grooved idler pulleys orsheaves 72, the pulleys 72 of each pair thereof having the same.arrangement relatively to each other as the pulleys or sheaves 70 ofeach said pairs have to each other, as hereinbefore described. Thepulleys 72, however, are adapted to ,serve similarly as anti-frictionguides for the hoisting or supporting-cable S and to prevent cutting orwear upon the line or cable S as it enters and leaves'the bucket and inany position of the bucket under substantially all working or operatingconditionsfthe line or cable S, which, in practice, is usually fastenedat one end to some suitable fixed point on the boom, derrick, run-way,or the like, being first threaded through a pair of the sheaves 72, thenled down to and under one of the main supporting-cable sheaves 33, thenacross to the grooves of the sheaves 33; and that the neeaaeo sheaves 83will freely work in the bi ht of the holding or supportingcable theguide-sheaves 72 are in such vertical alinement relatively to thesheaves 33 that the line or cable S, as it passes from one pair ofsheaves 72 to one sheave 33 and back from the other sheave 33 to theother pair of guide-sheaves 72, is always approximately straight.

At its lower end, each of the slidable pins is formed or provided with apair of oppositely disposed lateral wings or cars 73. As seenparticularly in Figs. 2 and 3, each of the pins 30 is disposedapproximately centrallyat the side of the bucket between the upper endsof a'pair. of the tray-connecting-bars 35. Having their lower or innerends pivotally fastened to the wings or ears 73 of the respective pins30, are pairs of oppositely-disposed laterally and upwardly projectinglinks 7 4, the upper or outer ends of the llnks 74 being pivotallyfastened to lugs or ears 7 5 formed or provided on thetray-connecting-links 35. By means of the pins 30 and links 74-, theupper and lower centers of the bucket are always kept or maintained inproper operative alinement under substantially all working conditionsand irrespective of the position of the bucket. To prevent any bindingengagement between the inner ends of the links 74 and theupper centercasting in the move-.

ments of the pins 30, the pins 30 are preferably provided adjacent theirlower ends with collars or the like 76 adapted to abut against the lowerends of bored casting-portions 28 as the pins 30 move upward in theopening and closing of the trays or jaws of the bucket.

The operation and handling of my present bucket is also substantiallysimilar to the operation and handling of the bucket shown and describedin said Lettrs Patent No. 1097317. By means of the supporting orholding-cable S, the bucket as a whole, with its trays or jaws either inopen or closed position, depending'upon the winding of the closing orload-cable L on its winding-drum,

may be hoisted and held or supported in various raised or loweredportions relatively to the material being operated upon, the sheaves 33working smoothly in the bight of the two-part line or cable S and :theidler sheaves 72 protecting the line or cable S from being cut or wornas it enters and leaves the bucket and irrespective of the posit-ion ofthe bucket under substantially any working conditions, as hereinbeforedescribed. Due to the spaced relation of the sheaves 33, bending strainson the line or cable S are reduced to substantially the minimum. To openthe trays or jaws of the bucket, the load or closing-cable L, reevedaround the upper and lower series of sheaves 63 and 52, respectively, asbefore mentioned,

is released and permitted to unwind from its winding-drum, when lowersheaves 52 will drop by gravity, the trays or jaws opening, the openingmovement of the trays or jaws of the bucket being accelerated by theweighted lower center casting. The beveled faces l4t1.i of the lowercenter casting now come into play, the engagement therewith of the upperedges of the reinforced ends of the tray-arms 6 limiting the openingmovement of the trays or jaws. On the line or cable L being caused towind upon its winding-drum, the trays or jaws of the bucket are broughtto closed position by the power exerted thereupon through the tackledevice described, the trays or jaws in such closing movement digginginto and scooping up the sand, gravel, ore, or other material beingoperated upon. In the present bucket, the tray connecting-rods or links35 are of somewhat extended length, and hence, the links 74: furtherbeing pivotally fastened to the links 35 at a point adjacent their upperends, the pins 30 in each opening and closing movement of the trays orjaws have a limited reciprocatory up and down movement in theirbearings, these pins 30 and the pivotally connected or fastened links74:

,efiectually stabilizing the upper center rela tively to the lowercenter and efficiently and simply maintaining the upper and lowercenters in operative alineinent irrespective of any turning or twistingmovement or other position of the bucket under substantially all workingor operating conditions. The upper sheaves 63 being angularly disposedrelatively to the lower sheaves 52, the torsional or twisting strain onthe line or cable L is less than were the upper sheaves I 63 in verticalcooperating alinement with the lower sheaves 52, and in my presentbucket, as in the bucket shown and described in said Letters Patent No.1097317, there is little, if any, liability of the cables or linesslipping out of or jumping the grooves of the respective sheaves,unnecessary stoppage of the operation of the bucket and unnecessary wearand tear on the cablesbeing thereby obviated. From the descriptiongiven, taken in connection with the accompanying drawings, it will beobserved that the several parts of my present bucket may be convenientlyassembled and renewed when required through breakage or other cause; andit will be understood that changes in the form, construction,arrangement, and combination of 'the several "parts of my bucket may bemade 1. A bucket of the'class described, the

same including a supporting-head or upperv center, a movable lowercenter, sheaves mounted for rotation in the upper and lower centers,cooperating load-trays, connectingbars pivotally connected to the uppercenter and to the trays, arms on the trays pivotally connected to thelower center, and a closing line cooperating with the upper and lowersheaves to lower and raise the lower center and thereby open andclosethetrays,

10 in combination with means for maintaining the upper and lower centersin working alinementin the operations of the bucket,

said means comprising pins mounted for endwise slidable movement in theupper cen'-.

l5 ter, and links pivotally connected at their .opposite ends to saidpins and to said connecting bars.

2. A bucket of the class described, the

same including a supporting-head or upper center, a movable lowercenter, sheaves mounted for rotation in the upper and lower centers,cooperating load-trays, connectingbars pivotally connected to the uppercenter and to the trays, armson the trays pivotally l connected tothelower center, and a closing line cooperating withithe upper and lowersheaves to lower and raise the lower center and thereby open and closethe trays, in combination wit-h means for maintaining the upper andlower centers in working alinement in the operations of the bucket, saidmeans comprising pins disposed vertically relatively to the uppercenter, said pins being mounted in the upper center for endwise slidablemovement relatively thereto, and links disposed laterally of the pinsand pivotally connected at their ends to said pins and to saidconnecting-bars, said pins having a reciprocatory up and down movementon each opening and closing movement of the trays.

3. A bucket of the class described comprising, in combination, an uppercenter provided at its ends with oppositely disposed pairs ofbearing-ears and with pinbearingsintermediate said pairs of ears, a

movable lower center, sheaves mounted for rotation in the upper andlower centers, cooperating load-trays, connecting-bars pivotallyconnected to the trays and to the ears of the upper center,rigid arms onthe trays pivotally connected to the lower center, a closing-linecooperating with the upper and lower sheaves to lower andraise the lowercenter and thereby open and close the trays, and means for maintainingthe upper and lower centers in working alinement in the operations ofthe bucket, said means consisting of pins disposed vertically relativelyto the upper center, said pins being mounted in said pin-bearings forendwise slidable movement relatively to the upper center, and linksdisposed laterally of the pins and pivotally connected at one end to theconnect- .65 ing-bars at a point intermediate the ends of arms on thetrays having this upper ends meaeae the connecting-bars and at theirother end to the lower ends of said pins, the pins having areciprocatory up and down movement on each opening and closing movementof the trays.

4:. A bucket of the class described comprising, in combination, asheave-frame, op positely disposed extensions projecting outwardly fromopposite walls of the sheaveframe, ears depending from said extensionsin parallel relation to, and spaced outwardly from, the adjacent Wallsof the sheaveframe, load-trays, rigid arms on the trays having theirupper ends disposed between said ears and the adjacent walls of thesheave-frame, and pins projecting loosely through the upper ends of saidarms and having a bearing in said ears and in the said adjacent walls ofthe frame for pivotally fastening the trays and sheave-frame together.

'5. A bucket of the class described com-. prising, in combination, anupper center, a movable lower center, cooperating loadtrays,connecting-bars pivotally connected to the upper center and to theload-trays, oppositely disposed" extensions projecting outwardly fromopposite walls of the lower center, said extensions being provided ontheir under surfaces with op- 95 positely disposed oblique faces, earsdepending from said extensions in parallel relation to, and spacedoutwardly from, the

adjacent walls of the lower center, rigid disposed between, andpivotally connected to, the ears and the adjacent walls of the lowercenter, and mechanism for'lowering and raising the lower center andthereby opening and closing the trays, said extensions at their obliqueunder faces and said rigid arms at the upper edges of their upper endsbeing adapted to engage to limit the downward movement of the lowercenter and the opening movement of the trays.

6. In combination with a bucket of the class described, a tray havingapertured earportions, connecting-bars having aperturs at their lowerends, said bars being respec tively disposed adjacent said cars, atubular member disposed transversely between said apertured portions ofthe bars, pivot-pins projecting through the apertures of said ears andbars and into said tubular-member for pivotally securing the bars andtray together, and wedge-keys projecting through said tubular-member andsaid pins for securing said pins against removal.

7. A bucket of the class described com-- prising, in combination, asupporting-head, load-trays pivotally connected to the head, means foropening and closing the trays, including a line, and a guide for theline including a thimble mounted for rotary movement in the head, spacedupwardly presented plates fixed on the thimble, and a pair of groovedidlers 'ournaled to rotate between the plates and isposed obliquely onebelow the other, the peripheral portions of the idlers being so disposedthat, for parts of their rotary travel, the peripheral portions of bothidlers will rotate in the same horizontal plane relatively to the headand also in a plane approximately vertically in alinement with the boreof the thimble.

8. A bucket of the class described comprising, in combination with aline or cable, a supporting-head having an aperture for the line, a pairof spaced plates mounted upon the head at said aperture, and a pair ofgrooved idlers for the line journaled to rotate between the plates anddisposed obliquely one above the other, the peripheral portions of bothidlers rotating during a part of their travel in a plane approximatelyvertically in alinement with said aperture.

9. A bucket of the class described comprising, in combination with aline or cable, a supporting-head having an aperture for the line, a pairof spaced plates mounted for rotary movement as a unit upon the head atsaid aperture, and a pair of grooved idlers --for the line journaled torotate between the plates and disposed obliquely one above the other,the peripheral portions of both idlers rotating during a part of theirtravel in a plane approximately vertically in alinement with saidaperture.

.10. A bucket of the class described comprising, in combination with atwo-part line or cable, asupporting-head having apertures for the line,a pair of spaced yoke-plates fixed at their ends to the head, saidplates being located beneath, and extending longitudinally of, the head,and a pair of spaced sheaves journaled between the plates to take thebight of the line.

11. A bucket of the class described comprising, in combination with atwo-part line or cable, a supporting-head having apertures for the line,a pair of spaced yokeplates fixed at their ends to the head, said platesbeing located beneath, and extending longitudinally of, the head, a pairof spaced sheaves journaled between the plates to take the bight of theline, and grooved idlers mounted upon the head for guiding the line in astraight path to and from the sheaves.

In testimony whereof, I have signed my name to this specification.

' LEMUEL J. HATT.

